Show Coastlines on Maps

2021 5 3
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更新时间：2021 5 3
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I want to mark the coastline that seperate Asia from the sea

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KSSV
KSSV 2021-5-3
What data you have? Do you have bathymetry data?
gyeonggeun kim
gyeonggeun kim 2021-5-3
No I don't have bathymetry data. I have AVISO geostrophic velocity field data.
Is there a code to mark the coastline?

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KSSV
KSSV 2021-5-3

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Download the bathymetry data from this link: https://www.gebco.net/data_and_products/gridded_bathymetry_data/ to your required domain and resolution.
If X, Y, H is your regions grid coordinates and bahymetry/ depth data, you can get coastline using:
contour(X,Y,H,[0 0])

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